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Background colour in PDF with export activated
by Florent Michel 20 Nov '24

20 Nov '24

Hi, I'm having issues generating PDF files with a coloured background when export is set to ‘yes’. Minimal example: \setupbackend[export=yes] \setupbackgrounds [page] [background=color,backgroundcolor=black] \starttext \startcolor[white] test \stoptext This example seems to work as expected when I comment out the first line (a black page with the word ‘test’ in white). However, with the first line the pdf looks entirely white. Is this a known issue, or am I doing something wrong here? Use-case: I am trying to generate a pdf and an html files with equivalent content, the latter being primarily used for accessibility purposes. One workaround is to split the tex file in two, e;g;: % main.tex \setupbackgrounds [page] [background=color,backgroundcolor=black] \starttext \startcolor[white] test \stoptext %main-exp.tex \setupbackend[export=yes] \input{main.tex} This way, I can generate the correct pdf by compiling main.tex and the html by compiling main-exp.tex (adding a custom .css file to get a black background). But I'm wondering if there is a way of generating the correct pdf without moving the line ‘\setupbackend[export=yes]’ into a different file. Best regards, Florent

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\inch not doing the expected thing (what I expect, anyway).
by Jim 15 Nov '24

15 Nov '24

Hi, I would expect (*cough*) \starttext 2\inch \stoptext to output something like 2" with some appropriate typographic symbols following the 2. Instead, I get a 2 with a large prime symbol down lower than a prime symbol should be, and then a second prime symbol at about the correct size and at about the right distance up from the baseline. Are my expectations about what \inch should do incorrect? I do notice that $2\inch$ does what I expect, but if I have to enter math mode, I may as well type $2''$ to get what I want. In summary, is \inch working as intended or it is broken? Thanks. Jim

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Problem with tabulate
by Thomas Meyer 15 Nov '24

15 Nov '24

Hi Guys, I am trying out the following environment: \starttabulate[p(5mm)p(5mm)] \HL \NS[1][c] Wurfstärke R / H \NC\NR \NC 2 \NC 3 \NC\NR \HL \stoptabulate These are the columns of a larger table that cause problems. P() and \NS do not work together. But also \starttabulate[cc] \HL \NS[1][c] WurfstärkeR / H \NC\NR \NC 2 \NC 3 \NC\NR \HL \stoptabulate does not provide the desired result. Ideally, “R / H” should be under “Wurfstärke”, i.e. there should be a line break. (\\ doesn't work) Both in a combined cell. Then the numbers below should be centered in their separate cells. Something like this: Wurfstärke R / H 3 2 How can this be achieved? I am grateful for any advice. Greetings Thomas

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max function in spreadsheettable
by juh+ntg-context＠mailbox.org 14 Nov '24

14 Nov '24

Dear all, I have a cell that calculates a value that may not be a negative value. If it is a negatiive value the cell should show zero. \startcell[style=normal] @ "0.2f EUR" $pauschale.eintag$ - ((D[row] * (0.2 * $pauschale.vororttag$)) + (E[row] * (0.4 * $pauschale.vororttag$)) + (F[row] * (0.4 * $pauschale.vororttag$))) \stopcell The $-variables will get resolved by Pandoc before ConTeXt comes into play. As far as I understood the handdbook spreadsheets-mkiv.pdf it is possible to define lua functions inside a cell. Who would you implement a max function that sets the value to 0 if it is negative? TIA juh P.S. For German speakers: We try to implement a Reisekostenformular.

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full-width Chinese comma (U+FF0C) and ordinary comma (U+002C) in Chinese texts
by mf 14 Nov '24

14 Nov '24

Hello, I'm typesetting a bibliography with some Chinese books that have both the English translation and the original title in Chinese ideograms. The Chinese titles contain both full-width commas (U+FF0C) and ordinary commas (U+002C), followed by spaces. Full-width comma has a wide glyph that incorporates some space on the right side; I read on Wikipedia it's a mistake putting a space after it. THE PROBLEM ConTeXt does not break a line after a full-width comma (even inside a "{\cn ... }" group), while it does with an ordinary comma, followed by a space. When there are only full-width commas, sometimes I'll get overfull boxes, because ConTeXt finds no feasible breakpoints. I'm tempted to replace all the full-width commas with ordinary commas followed by a space. Is it possible, or is it a mistake? Or, how do I tell ConTeXt that breaks can occur after full-width commas? Massi

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regular online meet-up
by Henning Hraban Ramm 13 Nov '24

13 Nov '24

You’re invited to our regular online meet-up, this upcoming Wednesday, November 13, 19:00 CET (UTC+1) at https://lecture.senfcall.de/hen-rbr-rku-oke (same, but shorter: https://u.mtxrun.eu/ctxmtg) ConTeXt users of all levels are welcome! Looking forward to seeing you, Hraban (Same blurb as always:) [Howto] * No special software installation required; most modern browsers should work (WebRTC required). * Open the URL above, accept the privacy statement, * enter your name, * click "join" (or "start" if you’re the first), * click "with microphone", allow your browser to access it, check the audio. * Your microphone is muted if you join. Activate microphone and/or camera with the buttons at the bottom. * Minimize the default presentation with the "screen" button, bottom right. * If you’d like to share your screen or upload a file, you can make yourself the presenter: Click on your user name, change the setting, then you’ll see the "screen sharing" button beside the camera button; also there’s now "manage presentations" behind the "plus" button. Beware there is only one presenter at a time, so don’t kill someone else’s presentation. [Technical hints] * Sound is usually better if you use a headset (less noise for everyone). * Connection problems are mostly due to low bandwidth or high latency on your side, e.g. with mobile connections. * Sometimes leaving and re-entering helps. * If audio/video doesn’t work for you, you can still use the text chat. * Screen sharing needs a lot of bandwidth. * BigBlueButton documentation applies: https://bigbluebutton.org/teachers/tutorials/ [Netiquette] * Please use a name that we recognize from here. Some feel uncomfortable with anonymous lurkers. * Mute your microphone while you’re not talking. * It’s nice to show your face at least when you join. * If there are connection problems, stop camera sharing. * The room is set to “everyone’s a moderator“, I trust you...

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chemical structure diagrams
by Henning Hraban Ramm 12 Nov '24

12 Nov '24

Hi, since recently had that nice thread about electrons and Hans announced to rewrite the chemical stuff, I wanted to mention this LaTeX package for drawing chemical structure diagrams in MetaPost: https://ctan.org/pkg/mcf2graph Maybe there’s some usable code? (I’m not very interested in chemistry and won’t need it. It’s just a pity that we had this nice module and it doesn’t work any more.) Hraban

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serial letters
by Henning Hraban Ramm 11 Nov '24

11 Nov '24

How would you approach serial letters, e.g. to all members of a club? (Actually I need to send out donation receipts.) I’d like to use the letter module, since my usual letter design is using it. I can export the addresses to CSV, JSON, Lua tables or whatever or transfer them to a SQLite db. Would it make more sense to read them in Lua and combine this data with a buffer, or to write a single tex file for every letter? I know how to do the latter, but I’d like to learn a more ConTeXt-ish way. Would it make sense to use the bibliographies module? Greetlings, Hraban --- https://www.fiee.net http://wiki.contextgarden.net https://www.dreiviertelhaus.de GPG Key ID 1C9B22FD

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Luametatex: nesting alignments in display math formulas
by ntg-contextmailingli.expedited080＠passmail.net 10 Nov '24

10 Nov '24

I'm test driving luametatex. My needs usually extend to expressing formulas in TLA+ using nested display math formulas. Although I have suitable templates for doing this in Mark IV, I can't reproduce these satisfactorily in luametatex. For example, here's a formula from Leslie Lamport's 2006 "Lower Bounds for Asynchronous Consensus": ~~~~~~~~~~~ transitive_reduction.tex ~~~~~~~~~~~~~ \define\lbr {\lbrace \mkern 0.9mu} \define\rbr {{}\mkern 0.9mu \rbrace} \define\∀ {∀\mkern1mu} \define\∃ {∃\mkern2mu} \startdocument \startplaceformula \startformula [split=yes, align=flushleft, margin=standard, interlinespace=1ex] \bgroup \setupinterlinespace [line=1ex] \startalign [n=1, align={left,left}] \NC \text{\it TransitiveClosure}(R) ≜ \NR \NC \quad \bgroup \setupinterlinespace [line=1ex] \startalign [n=2, align={left,left,left}, location=top] \NC \text{\sc let} \quad \NC \bgroup \setupinterlinespace [line=1ex] \startalign [n=1, align={left,left}, location=top] \NC \text{\it Dom} ≜ \lbr r[1]: r ∈ R \rbr \NR \NC \text{\it Rng} ≜ \lbr r[2]: r ∈ R \rbr \NR \NC \text{\it TC}[i ∈ ℕ] ≜ \NR \NC \quad \bgroup \setupinterlinespace [line=1ex] \startalign [n=1, align={left,left}, location=top] \NC \text{\sc if}\ i = 0\ \bgroup \setupinterlinespace [line=1ex] \startalign [n=2, align={left,left,left}, location=top] \NC \text{\sc then}\ \NC R \NR \NC \text{\sc else}\ \NC \bgroup \setupinterlinespace [line=1ex] \startalign [n=1, align={left,left}, location=top] \NC \lbr 〈d, e 〉∈ \text{\it Dom} × \text{\it Rng}: \NR \NC \quad \∃ c ∈ \text{\it Dom} ∩ \text{\it Rng}: \bgroup \setupinterlinespace [line=1ex] \startalign [n=1, align={left,left}, location=top] \NC ∧ 〈d, c〉∈ \text{\it TC}[i-1] \NR \NC ∧ 〈c, e〉∈ R \,\rbr \NR \stopalign \egroup \NR \stopalign \egroup \NR \stopalign \egroup \NR \stopalign \egroup \NR \stopalign \egroup \NR \NC \text{\sc in}\ \NC \text{\sc union}\ \lbr \text{\it TC}[i] : i ∈ ℕ \rbr \NR \stopalign \egroup \NR \stopalign \egroup \stopformula \stopplaceformula \stopdocument ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ The command $ context --luatex transitive_reduction.tex produces the desired result, but $ context transitive_reduction.tex rejects the alignments and centers the lines instead. Can anyone suggest how I might adapt such nesting of alignments to luametatex?

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Position of wide tables after split
by Niklas von Hirschfeld 09 Nov '24

09 Nov '24

Hi there, I need a table, which is longer than the textwidth (textwidth + rightmarginwidth + rightmargindistance) and longer than a page. I got the width with the 'textwidth=\dimexpr ...' for the TABLE and the splitting working. The problem: on the first page the positioning is exactly how I want it to be, overflowing into the right margin. But on the following pages it overflows into the left margin. Here is a minimal example: \startplacetable[location={split}] \bTABLE[option=stretch,split=yes,textwidth=\dimexpr\textwidth+\rightmarginwidth+\rightmargindistance\relax] \dorecurse{100}{ \bTR \bTD Cell 1 \eTD \bTD Cell 2 \eTD \bTD Cell 3 \eTD \eTR } \eTABLE \stopplacetable is there a way to influence this behavior? I'm currently on the version: 2024.11.01 19:19 Thank you very much Niklas von Hirschfeld

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